The Kustom (now NuVo) KHS-4640 had its own, stupid pin-out. It is NOT like a 568A or 568B Ethernet pin-out. It is the same as the old AT&T straight through phone cable.

Pin 1 on one side goes to pin 8 on the other.
Pin 2 to 7
Pin 3 to 6
Pin 4 to 5
Pin 5 to 4
Pin 6 to 3
Pin 7 to 2
Pin 8 to 1

This created such a HUGE problem for Kustom (a million calls to tech support) that when they changed to NuVo, they went with a standard patch cable pin-out.